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"In comparison with lowland area, the upland area has been less prioritized in the development scheme and relatively left behind in the introduction of productive technology. Additionally, physical condition of the dry-upland becomes major problem for people to gain a better welfare. There is now steadily an increasing government concern and awareness of the importance of this area. Despite the development equity jargon, the recognition of the significance of upland lies to the fact that upland position is not only substantial but also decisive within watershed system. Land and water conservation work on these spheres of upland attractiveness. The study is directed to the inventory of this land and water conservation activities as a mean of development interventions to upland. Furthermore, appraising popular perception and participation in the activities is also the main part of the objective of this study. To facilitate this objective achievement, the study is purposely conducted in one of upland regency in Wonogiri. Two villages have been selected and 150 farmers has been randomly selected and interviewed."

"Sumber air utama untuk wilayah Sukabumi tertumpu pada kawasan pegunungan Gunung Gede-Pangrango dan Gunung Halimun- Salak. Kawasan tersebut adalah hulu dari daerah aliran sungai Cimandiri yang mengalir ke selatan wilayah Sukabumi sampai ke Iaut di Kota Pelabuhanratu, ibukota Kabupaten Sukabumi.Pemanfaatan air di kawasan hulu berupa air tanah dan air mata-air selain untuk kebutuhan rumah tangga juga untuk industri. Keuntungan dari pemanfaatan air tersebut oieh industri umumnya belum disertai membayar beaya pemulihan.Penggunaan air cenderung meningkat secara eksponensial, sedangkan pasokan air cenderung melambat akibat rusaknya hutan di daerah tangkapan airnya. Internalisasi pengelolaan daerah tangkapan air untuk penyediaan air baku dilakukan untuk mengatasi masalah tersebutTujuan penelitian adalah mendapatkan gambaran kondisi air tanah dan perkiraan nilai air tanah melalui pendekatan perhitungan nilai ekonomi manfaat lokal daerah tangkapan airnya, persepsi dan keharusan pengguna air tanah untuk membayar beaya pengelolaan daerah tangkapan airnya.Hasii penelitian diharapkan dapat memberikan informasi untuk melestarikan sumberdaya air dan melestarikan fungsi lingkungan alam. Informasi dari penelitian ini dapat memperkaya khasanah pengetahuan untuk pertimbangan dalam perencanaan pembangunan daerah tersebut.Penelitian dilaksanakan dan bulan Januari sampai dengan Juni 2003 di Kecamatan Cicurug, Kecamatan Cidahu, Kecamatan Parakansalak dan Kecamatan Parungkuda di kaki Gunung Salak dalam wilayah Kabupaten Sukabumi. Daerah penelitian berada pada Kompleks Gunungapi Tua di wiilayah resapan utama dan juga berada di wilayah pelepasan. Penelitian bersifat ex post facto melalui pendekatan kualitatif dan kuantitatif. Data primer dan sekunder dikumpulkan dengan metode survei dan studi pustaka.Hipotesis yang diajukan adalah tersedianya air tanah akan berlanjut jika neraca air terjaga keseimbangannya dan daerah tangkapan air terlindungi.Hasii kajian memperlihatkan bahwa air tanah ada di 100-300 meter di bawah permukaan tanah setempat. Pelepasan air tanah berupa mataair ada yang mencapai 400 lt/dt dan penurapan melalui sumur bor dengan debit mencapai 2 It/dt hingga 5 lt/dt. Neraca keseimbangan air di daerah penelitian mengaiami defisit air tanah sebanyak 4,4 juta m3 pada tahun 2003. Kecenderungan air tanah berkurang adalah akibat perubahan kondisi tutupan lahan disertai dengan ekstraksi air tanah yang terus bertambah.Hasil analisis ruang dan wilayah daerah penelitian memperlihatkan adanya interaksi antara daerah tangkapan air dan daerah perlepasan serta lokasi cadangan air tanah. Kegiatan ekonomi yang menggunakan air tanah tidak terpisahkan dari kawasan hutan Iindung Gunung Salak sebagai daerah tangkapan airnya. Pemanfaatan air tanah di kawasan hulu akan dapat menghilangkan peluang kegunaannya bagi kawasan hilirnya. Sepatutnya kawasan hulu menjadi kawasan tumbuh lambat yang diprogramkan untuk fungsi konservasi atau lindung karena menjadi satu kesatuan ekosistem dari hulu sampai ke hilir.Air adalah satu fase bentuk sumberdaya alam yang secara alamiah mengalami siklus perubahan bentuk. Sumberdaya alam ini pada fase bentuk air menjadi kebutuhan dasar semua mahluk hidup di bumi. Sebagai kebutuhan dasar, air tidak dapat menjadi komoditi (barang ekonomi) yang dapat diperdagangkan dan diberi label harga. Prinsip yang memandang air sebagai komoditi (barang ekonomis) akan menghilangkan fungsi ekologis, sosial, religius dan budaya.Pengguna air tanah dapat dikenakan beaya masa siklus air. Beaya masa siklus air adalah beaya kerugian yang dialami oleh generasi masa depan akibat pemanfaatan sumberdaya alam masa kini. Nilai masa siklus air dihitung melalui pendekatan valuasi manfaat Iokal sumberdaya hayati dan manfaat lokal sumber air.Beaya masa siklus air di Iokasi penelitian per hektar hutan sebesar Rp. 2.924.890,- setiap tahunnya. Persepsi dan pemahaman tentang beaya masa siklus air belum sepenuhnya disadari oleh perusahaan air minum dalam kemasan. Akibatnya adalah masih banyak perusahaan belum bersedia ikut berperanserta daiam kegiatan konservasi daerah tangkapan air.Berdasarkan hasil analisis dan pembahasan dalam tesis ini, dapat disimpulkan sebagai berikut:1. Tersedianya air tanah berkurang karena terganggunya keseimbangan neraca air akibat penurapan melalui sumur bor lebih besar dan suplesi air tanah.2. Beaya bagi tersedianya air adalah beaya kerugian yang akan ditanggung oleh generasi masa depan.3. Pengetahuan dan pemahaman tentang beaya masa siklus air belum sepenuhnya disadari oleh pengusaha air tanah.Saran dari penulis dalam tesis ini adalah; (1) Perlu dilakukan segera pengendalian ekstraksi air tanah melalui penataan ulang SIPA yang telah dikeluarkan, penutupan sumur bor yang tidak memiliki ijin atau melebihi debit yang diijinkan, penghentian ijin baru dan peningkatan pengawasan pemanfaatan air tanah; (2) Memperbesar suplesi air tanah meIaIui pengendalian pembangunan permukiman di daerah tangkapan air, menghutankan kembali Iahan yang bersudut Iereng lebih dari 30% dan pembangunan ?embung" atau ?waduk kecil" sebagai sumber air bersih untuk memenuhi kebutuhan penduduk; (3) Perlu disosialisasikan secara luas kepada masyarakat tentang beaya masa siklus air. (4) Perlu disosialisasikan paradigma air sebagai hak asasi manusia. Setiap orang berhak memperoleh air bersih khususnya air minum dan kewajiban negara untuk memenuhinya.

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The main source of water in the Sukabumi is the reservoirs found in the Gede Pangrango and Halimun Salak highlands. These areas are the up river of the Cimandiri River which flows south through Sukabumi all the way to the Southern coastal city of Pelabuhan Ratu, the capital city of Sukabumi District. These water reservoirs, ground reservoirs and spring water, have been used in the upper regions for many years. The use of the ground water for domestic needs and industrial needs is increasing rapidly. Revenue through the use of these water resources by industry has not been charged with conservation cost of these resources.

As the use of water has increased exponentiaily, supply tends to decrease due to the destruction of the upper catchments areas that are now being developed or destroyed. Internal control in the areas with their hydrology functions are being assessed in order to over come the problem before it gets out of hand.

The aim of this study is to estimate the current ground water condition, its value through analysis of local economic value of water catchments area and the current price of water. To understand perceptions and ability of water consumers to pay reservation cost of the water catchments area.

Results would enrich information in the effort to preserve natural water resources and natural environment as a unified natural resource. Information obtained may also be useful in future planning and development of these areas.

This research has been carried out in the Counties of Cicurug, Cidahu, Parakansalak, and Parugkuda, from January to June of 2003. The focus area is located at the foot of the Salak Mountain in the area of Sukabumi district. The form of research that has been used is ex post facto through qualitative and quantitative approach. The primary and secondary data were was collected through surveys and studies of literatures.

The result of studies has shown that the area in the vicinity of Gunung Api Tua is located in the main water absorption area, which is also the area of ground water release. Ground water potential is found to be between 100-300 meters below ground surface. The release of ground water from springs is at a rate of 400 It/sec and extracted using drill-wells at a rate of 2 lt/sec up to 5 lt/sec. The balance water measured in this area shows a deficit of as much as 4,4m3 in the year 2003. Ground water deficit tends to continue declining as result of man-made change in the soil covering due to building constructions agriculture as such that disturbs the seepage of rain water into the ground, hence the replenishment, while water extraction continue to increase.

Result of space and area analysis of research area shows that an interaction exists between the water catchments areas, water releasing areas, and the areas where the ground water is naturally stored. Therefore, economic sectors benefit from the ground water supply should not be freed from their responsibility in forest conservation and protection of Salak Mountain as water catchments areas. Using ground water in water areas will eventually reduce or even eliminate the benefit for water draining areas. It should be understood that water catchments area must be considered as areas of conservation and protection, because of its ecosystem unity from water-catchments area to water-released areas.

Liquid water is one phase in the cycle of this resource, which is naturally changing in form and state. In its liquid phase, water is a basic necessity for all living organism on this earth. As a basic necessity, water cannot become a commodity to be commercialised and given a price label. Considering water as eoonomic commodity will lose its ecological, social, religious and cultural functions.

Water users could be charged with water cycling costs. Water cycle cost is atpenses to cover losses which wlll be experienced by future generations due to present resource ulilisation. The value of water cycle period is calculated by local usage valuation approach of the biological resources and the local use of water resource.

The annual per hectare expenses of water cycle at the site of investigation is calculated at Rp. 2.924.890,-. Perception and understanding in the expenses for water cycling period have not been fully realized by water packing companies. Consequently there are still a great number of companies that are not willing to participate in the effort of water catchments area.

Water is only one phase of a natural cycle that is always moving. This natural resource when it is in the water phase is essential to the life of all animals on earth. As a basic need water can not beoome a commodity that can be sold with a label and a price, it is priceless. The principle that view water as a commodity will absolutely destroy its ecological, social, and cultural function and even will threaten our religious foundations. All humans have rights to have clean water, and it is not a commodity.

Water cycle cost in research area per hectare forest is Rp. 2.924.890,- every year. Perceptions and understanding about water cycle cost is not completely realized by water-packing company. As result, there still many companies that weren?t willing to participate in conservation program of water-catchments area.

Conclusions of research result and discussion in this thesis are: 1) There is deficit of ground water in research location as result of disturbances the equilibrium of water scale. The disturbances is caused by the used of ground water through artificial pump-well that larger than infiltrate of water volume. There is company that used ground water in water-absorbent areas and water-released areas In Salak Mountain areas. Ground water that is extracted from those areas are products of conservation forest water-catchments area; 2) Water cycles should be included in production total cost by water ground user. The value of water cycles cost can be calculated through valuation approach of local benefit of natural resources and local benelit of water resources; 3) Even though the water cycles cost cannot implemented yet for ground water benefit management, the valuation approach can be easily used by people in community so that the used of the valualjon need to be socialized.

Suggestions from writer in this thesis are: a) we need to do more detail assessment about ground water storage, b) it is necessary to socialized water paradigm as human rights. Every human have rights to have clean water especially drinking water and it is obligation of the country to fulfil it; c) Some studies should be done so that water- cycle cost policy can be implemented. The study that can be done is study of scarcity rent and extraction cost; d) To minimize bias from calculating economic benefit from natural resources, we need to choose respondents accurately from areas that closed or those who lived near the forest."

"Gedung i-CELL FTUI merupakan salah satu fasilitas di lingkungan kampus Universitas Indonesia yang menyandang predikat bangunan hijau dan telah tersertifikasi EDGE Advanced melalui strategi konservasi air seperti pengumpulan air hujan dan penggunaan fitur hemat air. Akan tetapi, masih ada potensi sumber air alternatif lain yang belum dimanfaatkan, seperti daur ulang kondensat AC dan grey water. Penelitian ini bertujuan untuk (1) menganalisis kesesuaian potensi strategi konservasi air terhadap kriteria konservasi air untuk bangunan hijau; (2) menganalisis strategi konservasi air eksisting dan potensi kuantitas grey water sebagai sumber air alternatif; dan (3) menganalisis potensi air kondensat AC sebagai sumber air alternatif. Pada penelitian ini, kesesuaian kriteria konservasi air ditinjau berdasarkan perangkat penilaian Greenship New Building Versi 1.2 dan Peraturan Menteri PUPR Nomor 21 Tahun 2021. Pengukuran dan pengujian untuk sampel kondensat dan air hujan dilakukan dengan parameter kualitas yang merujuk pada Peraturan Menteri Kesehatan Nomor 2 Tahun 2023. Selain itu juga akan dilakukan analisis data sekunder untuk perhitungan timbulan grey water. Hasil penelitian menunjukkan bahwa pemanfaatan air hujan untuk kebutuhan flushing memiliki potensi pengumpulan hingga 91.870 L/bulan dan sebagian besar parameter memenuhi baku mutu, kecuali pH dan besi. Selain itu, seluruh fitur air memiliki keluaran air yang lebih rendah dari standar Greenship dengan potensi timbulan grey water sebesar 90.144 L/bulan. Pada kondensat AC, kombinasi kedua sistem AC sentral dan split dapat menghasilkan kondensat hingga 2.805,2 L/bulan dengan kualitas yang telah memenuhi baku mutu. Analisis kesesuaian konservasi air terhadap kriteria Greenship memenuhi lima dari enam parameter dan memperoleh 18 poin. Sedangkan pada kriteria Permen PUPR No. 21 Tahun 2021, memenuhi seluruh parameter dan memperoleh 12 poin. Secara keseluruhan, kombinasi pemanfaatan kondensat AC dan grey water dapat mengurangi hingga 59,75% pemakaian sumber air primer yang saat ini telah dibantu dengan pemanfaatan air hujan.

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The i-CELL FTUI building is one of the facilities on Universitas Indonesia that holds the title of green building and has been certified EDGE Advanced through water conservation strategies such as rainwater collection and the use of water-saving fixtures. However, there is still potential for other untapped alternative water sources, such as AC condensate recycling and grey water. This study aims to (1) analyze the conformity of potential water conservation strategies to the water conservation criteria for green buildings; (2) analyze the existing water conservation strategies and potential quantity of grey water as an alternative water source; and (3) analyze the potential of AC condensate water as an alternative water source. In this study, a review on the conformity of water conservation criteria is conducted based on the Greenship New Building Version 1.2 assessment tool and Peraturan Menteri PUPR Nomor 21 Tahun 2021. Laboratory measurements and tests were carried out for condensate and rainwater samples with quality parameters referring to the Peraturan Menteri Kesehatan Nomor 2 Tahun 2023. In addition, secondary data analysis will also be carried out for the calculation of grey water generation. The results show that rainwater utilization for flushing needs has a collection potential of up to 91,870 L/month and most parameters meet quality standards, except pH and iron. In addition, all water features have a lower water output than the Greenship standard with a potential grey water generation of 90,144 L/month. For AC condensate, the combination of both central and split AC systems can produce up to 2,805.2 L/month of condensate with quality that complies with quality standards. Analysis of the conformity of water conservation to Greenship criteria fulfils five of the six parameters and achieves 18 points. Meanwhile, the criteria of Permen PUPR No. 21 of 2021 fulfil all parameters and achieve 12 points. Overall, the combined use of AC condensate and grey water can reduce up to 59.75% of the use of primary water sources, which is currently aided by the use of rainwater."

"Sistem ACWH memiliki 2 kondensor yang berfungsi untuk memanaskan air dan membuang panas ke lingkungan yang masing-masing memiliki katup in/out pada pipa refrigerant. Dalam sistem ACWH seluruh refrigerant akan dialirkan ke DPHE untuk didinginkan, sehingga bukaan katup DPHE 100% terbuka, sementara aliran refrigerant ke air condenser tertutup. Media pendingin pada DPHE bersumber dari tangki penyimpanan yang di insulasi, jika air tidak digunakan untuk mandi berarti air akan bersirkulasi secara terus menerus dan terus mengalami peningkatan temperatur karena menyerap panas dari refrigerant sehingga panas tersimpan dalam tangki. Temperatur media pendingin terus meningkat menyebabkan pertukaran panas pada sistem tidak maksimal sehingga terjadi penurunan efisiensi kompresor serta peningkatan tekanan dan temperatur discharge. Untuk mengatasi peningkatan tekanan dan temperatur pada kompresor, panas pada sistem harus dilepaskan ke lingkungan sehingga refrigerant harus dialirkan ke air condenser untuk melepaskan panas ke lingkungan. Refrigerant tidak sepenuhnya dialirkan ke air condenser karena panas tetap dibutuhkan ke DPHE untuk memanaskan air, sehingga katup pada kedua kondensor tetap dibuka dengan perbandingan tertentu sesuai dengan kondisi. Katup pada DPHE akan tertutup ketika air panas sudah mencapai temperatur yang diminta. Pada saat ini katup masih dikontrol secara manual sehingga akan tidak efektif ketika digunakan. Untuk mengatasi kendala tersebut katup ini akan dikontrol secara otomatis dengan input command berdasarkan analisis karakter perpindahan panas pada beberapa bukaan katup berbeda pada masing-masing kondensor. Hasil percobaan yang didapatkan hasil tercepat untuk pemanasan air adalah dengan membuka katup ke DPHE 100% dan menutup katup ke kondensor air cooled dengan waktu pemanasan air 31 menit, tetapi terjadi over pressure dan over heat pada discharge kompresor yang mencapai tekanan >25 bar. Sementara pada bukaan 50% DPHE dan 50% air condenser, waktu pemanasan air dari 28°C ke 55°C mencapai 56 menit. Pada mode 3 & 4 dilakukan pengaturan katup ketika temperatur discharge kompresor mencapai 60°C, terlihat penurunan tekanan secara signifikan dalam beberapa saat. Variasi terbaik dari 4 percobaan diatas adalah diawali dengan 100% DPHE dan 75% DPHE, 25% kondensor saat temperature discharge kompresor mencapai 60°C. Hal ini dikarenakan memiliki laju perpindahan panas yang baik dan tekanan discharge terkendali karena Sebagian tekanan dialirkan ke kondensor. Jika tekanan melebihi 16 bar maka bukaan katup DPHE dikurangi dan membuka katup air condenser.

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The ACWH system has 2 condensers which serves to heat water and dissipate heat to the environment, both has an in/out valve on the refrigerant pipe. In the ACWH system, all refrigerant will flow to the DPHE to be cooled, so that the DPHE valve opening is 100% open, and the refrigerant flow to the air condenser is closed. The cooling medium in DPHE comes from an insulated storage tank, if the water is not used for bathing it means the water will circulate continuously and the temperature will continue to increase because it absorbs heat from the refrigerant and heat will be stored in the tank. The temperature of the cooling medium continues to increase causing the heat exchange in the system to be not optimal, and causing decrease in compressor efficiency and an increase in discharge pressure and temperature. To overcome the increase in pressure and temperature in the compressor, the heat in the system must be released to the environment so that the refrigerant must be flowed into the air condenser to release heat to the environment. Refrigerant is not completely flowed into the air condenser because heat is still needed to the DPHE to heat the water, so the valves on both condensers are still opened with a certain ratio according to conditions. The valve on the DPHE will close when the hot water has reached the required temperature. At this time the valve is still controlled manually, so it will be ineffective when used. To overcome these obstacles, this valve will be controlled automatically with an input command based on the analysis of the heat transfer character at several different valve openings in each condenser. The experimental results obtained the fastest results for heating water are to open the valve to 100% DPHE and close the valve to the water cooled condenser with a water heating time of 31 minutes, but there is over pressure and over heat on the compressor discharge which reaches a pressure of >25 bar. Meanwhile, at 50% DPHE and 50% air condenser openings, the water heating time from 28°C to 55°C reaches 56 minutes. In mode 3 & 4, the valve is adjusted when the compressor discharge temperature reaches 60°C, a significant drop in pressure is seen in a few moments. The best variation from the 4 experiments above is starting with 100% DPHE and 75% DPHE, 25% condenser when the compressor discharge temperature reaches 60°C. This is because it has a good heat transfer rate and the discharge pressure is controlled because some of the pressure is supplied to the condenser. If the pressure exceeds 16 bar then the DPHE valve opening is reduced and the air condenser valve opens."

"Pemanasan global menjadi isu fenomenal karena sangat bahaya bagi kehidupan. Pemanasan global terjadi akibat proses peningkatan suhu rata-rata atmosfer, laut, dan daratan di bumi. Salah satu penyebabnya disebut Efek Rumah Kaca. Faktor yang membuat efek ini bisa terjadi adalah semakin pesatnya pembangunan gedung di dunia ini. Salah satu upaya untuk menangani kondisi ini adalah dengan menerapkan konsep Green Building dan Net Zero Energy Building (NZEB). Green Building adalah sebuah konsep perencanaan atau penerapan terhadap bangunan yang dioperasikan dengan memperhatikan faktor-faktor lingkungan. Net Zero Energy Building adalah konsep bangunan tanpa energi yang bermaksud dapat memaksimalkan efisiensi energi dan memanfaatkan produksi energi terbarukan. Kedua konsep tersebut merupakan cara mengantisipasi pemanasan global dari bidang konstruksi yang bisa membuat lingkungan lebih baik. Sebagai bentuk dukungan penulis terhadap penerapan konsep tersebut, penulis dan tim mengikuti lomba yang diadakan ASHRAE (American Society of Heating, Refrigerating and Air-Conditioning Engineers) tentang Integrated Sustainable Building Design (ISBD). Dimana penulis dan tim melakukan perancangan dan penelitian terhadap gedung seni pada kampus dengan konsep Net Zero Energy Building yang berlokasi di Sydney, Australia. Penulis memfokuskan perancangan NZEB pada kategori Tepat Guna Lahan dan Konservasi Air. Untuk Tepat Guna Lahan, hal yang harus diperhatikan dalam perancangan adalah pemilihan tapak. Pemilihan tapak termasuk penting dalam perancangan NZEB ini. Tapak yang dipilih terletak di kawasan Macquarie University. Tapak tersebut dipilih dari 7 potensi tapak lainnya karena paling berpotensial dengan mempertimbangkan akses transportasi, luasan area, potensi tapak, fasilitas penunjang, dan jenis lahan. Untuk Konservasi Air, penulis menerapkan rainwater harvesting, pemanfaatan air bekas pakai, dan penggunaan fitur dengan efisiensi tinggi. Ketiga penerapan tersebut dapat mengurangi konsumsi air per tahun sebesar 38% dan mengurangi biaya yang diperlukan sebesar $307.113 per tahun.

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Global warming is a phenomenal issue because it is very dangerous for life. Global warming occurs due to the process of increasing the average temperature of the atmosphere, sea, and land on earth. One of the causes is called the Greenhouse Effect. The factor that makes this effect possible is the rapid development of buildings in this world. One of the efforts to deal with this condition is to apply the concept of Green Building and Net Zero Energy Building (NZEB). Green Building is a concept of planning or application of buildings that are operated with due regard to environmental factors. Net Zero Energy Building is a zero-energy building concept that aims to maximize energy efficiency and utilize renewable energy production. Both concepts are ways to anticipate global warming from the construction sector that can make the environment better. As a form of the author's support for the application of the concept, the author and the team participated in a competition held by ASHRAE (American Society of Heating, Refrigating and Air-Conditioning Engineers) on Integrated Sustainable Building Design (ISBD). Where the author and the team carried out the design and research of the campus art building which has a location in Sydney, Australia. The author focuses on the design of the NZEB on the category of Appropriate Site Development and Water Conservation. For Appropriate Site Development, the thing that must be considered in the design is site selection. Site selection is important in the design of this NZEB. The selected site is in the Macquarie University area. The site was chosen from 7 other potential sites because it has the most potential by considering transportation access, site area, site potential, facilities, and land type. For Water Conservation, the author applies rainwater harvesting, utilization of used water, and the use of features with high efficiency. These three applications can reduce water consumption per year by 38% and reduce the required costs by $307.113 per year."

"Sumber daya tanah dan air yang sangat penting untuk keberlangsungan manusia saat ini tengah menghadapi tantangan oleh erosi dan degradasi lahan yang disebabkan oleh perubahan iklim, khususnya pada skala DTA dan DAS. Untuk menghadapi masalah ini diperlukan analisis mendalam tentang tingkat kerentanan erosi pada sub-DAS dengan melihat karakteristik morfologi, tutupan lahan, dan erosivitas curah hujan untuk menentukan sub-DAS prioritas, agar dapat melakukan upaya konservasi yang tepat berdasarkan karakteristik sub-DAS tersebut. Penelitian ini bertujuan untuk mengetahui karakteristik morfometri sub-DAS dan mengevaluasi tingkat kerentanan erosi di Daerah Tangkapan Air (DTA) Danau Kerinci. Menggunakan Analisis Morfometri Kuantitatif, penelitian ini mengintegrasikan karakteristik morfometri, tutupan lahan, dan erosivitas hujan untuk menilai tingkat kerentanan erosi 18 subDAS untuk menentukan prioritas konservasi. Empat sub-DAS ditemukan memiliki tingkat kerentanan erosi yang sangat tinggi, yaitu sub-DAS Siulak Deras, sub-DAS Aek Siulak, sub-DAS Sangkir, dan sub-DAS Aek Pulau Tengah. Berdasarkan hasil ini, penelitian ini menyusun rekomendasi strategi konservasi yang disesuaikan dengan karakteristik tiap sub-DAS untuk mengatasi erosi dan mendukung pengelolaan sumber daya alam yang berkelanjutan.

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Soil and water resources that crucial for human sustainability, are currently facing challenges from erosion and land degradation caused by climate change, especially in the Catchment and Watershed scale. To address this issue, an in-depth analysis of erosion vulnerability is required for sub-watersheds by examining morphometric characteristics, land cover, and rainfall erosivity to determine priority sub-watersheds for appropriate conservation efforts based on their characteristics. This study aims to identify the morphometric characteristics of sub-watersheds and assess the level of erosion vulnerability in the Lake Kerinci Catchment Area. Utilizing Quantitative Morphometric Analysis, this research integrates morphometric characteristics, land cover, and rainfall erosivity to evaluate the erosion vulnerability of 18 sub-watersheds and establish conservation priorities. Four sub-watersheds were found to have a very high level of erosion vulnerability, namely Siulak Deras, Aek Siulak, Sangkir, and Aek Pulau Tengah sub-watersheds. Based on these findings, the study formulates tailored conservation strategies for each sub-watershed to address erosion and support sustainable natural resource management."

"Meningkatnya jumlah dan kepadatan penduduk Jakarta menyebabkan meningkatnya kebutuhan hunian. Keterbatasan penyediaan perumahan dan keterbatasan kemampuan daya beli masyarakat memunculkan permukiman yang dibangun sendiri oleh masyarakat. Sebagian warga dengan kemampuan terbatas terpaksa menempati lahan sekitar sungai dan danau. Keberadaan warga di sekitar danau berpengaruh terhadap keberlanjutan danau sehingga pengukuran kapasitas masyarakat menjadi salah satu langkah penting. Penelitian ini bertujuan untuk menguji apakah variabel aksi kolektif, pemberdayaan masyarakat, dan visi bersama mempengaruhi kapasitas masyarakat dalam konservasi Danau Cavalio dan Danau Kampung Bintaro, danau yang merupakan kolam retensi yang menampung debit air sungai Pesanggrahan yang dibangun untuk mengatasi banjir yang kerap melanda lokasi serta membandingkan pengaruh variabel aksi kolektif, pemberdayaan masyarakat, dan visi bersama terhadap kapasitas masyarakat dalam konservasi danau pada lokasi dengan jarak yang berbeda dari danau. Melalui 300 kuisioner yang disebar pada empat klaster di sekitar danau dengan tehnik Principal Component Anaysis PCA dan analisis regresi linier berganda, diperoleh hasil bahwa terdapat diferensiasi pengaruh variabel aksi kolektif, pemberdayaan masyarakat, dan visi bersama terhadap kapasitas masyarakat dalam konservasi danau, tetapi perbedaan tersebut tidak terkait dengan jarak lokasi dari danau. Variabel pemberdayaan masyarakat yang merupakan variabel yang paling berpengaruh signifikan terhadap kapasitas masyarakat dalam konservasi sumber daya air pada penelitian sebelumnya tidak terbukti. Sehingga, berdasarkan temuan pada penelitian ini, pemikiran bahwa masyarakat kota tidak dapat tinggal berdampingan dengan air tidak sepenuhnya tepat.

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The increasing number and density of Jakarta increased occupancy requirements. The limitation of the provision of housing and the limitation of the ability of the purchasing power of society gave rise to settlements that were built by the community. Most residents with limited capabilities was forced to occupy land around rivers and lakes. The presence of residents around the lake effect on sustainability of the Lake so that the measurement of the capacity of the community to be one of the important steps. This study aimed to test whether the variable is collective action, community empowerment, and shared vision affects the capacity of the community in the conservation of the Lake Lake and Kampongs Cavalio Bintaro, Lake which is retention ponds that hold discharge of river water building that was built to cope with floods that often hit the site and compare the influence of variable collective action, community empowerment, and a shared vision towards the capacity of communities in the conservation of the Lake on the location with a different distance from the Lake.

Through a detailed questionnaire distributed 300 on four cluster around the Lake with technical Principals Component Anaysis PCA and multiple linear regression analyses, obtained results that there is a differentiation of the influence of variable collective action, community empowerment, and a shared vision towards the community capacity for water reources conservation, but the difference is not related to the distance of the location of the Lake. Community empowerment of the variable which is the most influential variables significantly to community capacity in water resource conservation in the previous research was not proven. So, based on the findings in this study that the capacity of the community in the conservation of water resources are in the category of good, then the idea that society can not live side by side town with water is not entirely appropriate."

"Indonesia secara geografis dilalui garis khatulistiwa, sehingga Indonesia menjadi negara yang menerima sinar matahari secara kontinu dan merata. Setidaknya sebanyak 60% panas dari sinar matahari memasuki bangunan gedung melalui atap. Kondisi tersebut menyebabkan ketidaknyamanan penghuni, peningkatan cooling load, dan peningkatan emisi karbon yang dihasilkan oleh bangunan. Konservasi energi termal dari sinar matahari dapat dijadikan solusi tepat untuk mengatasi permasalahan tersebut. Energi termal yang berhasil dikonservasi dapat dialokasikan untuk aplikasi pemanasan tepat guna, seperti solar water heater. Penelitian ini menggunakan Closed Loop Pulsating Heat Pipe (CLPHP) sebagai heat exchanger pada sistem solar water heater. Closed Loop Pulsating Heat Pipe (CLPHP)  akan menyerap panas yang diterima atap bangunan. Fluida kerja di dalam Closed Loop Pulsating Heat Pipe (CLPHP)  akan bergerak ke bagian condenser dengan bantuan gaya gravitasi, dan memindahkan jumlah panas tersebut untuk memanaskan air. Eksperimen ini akan menggunakan fluida kerja De-Ionized (DI) Water. Filling ratio dengan variasi 40%, 50%, 60%, 70%, dan 80% menjadi variabel eksperimen. Eksperimen dilaksanakan dengan representasi iradiasi matahari sebesar 1.322 W/m2 sebagai heat input. Hasil eksperimen menunjukan bahwa filling ratio 50% menunjukkan hasil paling optimum dengan nilai resistansi termal (0,35 °C/W), waktu start-up sistem (11,43 menit), dan perolehan suhu akhir air di dalam tangki condenser (41,65 °C).

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Indonesia is located near the equator line, making it a country that receives abundant and continuous sunlight. At least 60% of the heat from sunlight enters the building through the roof. These conditions cause occupant discomfort, increased cooling loads, and increased carbon emissions produced by buildings. Conservation of thermal energy from sunlight can be the right solution to overcome these problems. The conserved thermal energy can be allocated for appropriate heating applications, such as solar water heaters. This research will use Closed Loop Pulsating Heat Pipe as the heat exchanger of the system. Closed Loop Pulsating Heat Pipe will absorb the thermal energy from the solar irradiance, and with the help of working fluid and gravitational force the heat will be transferred from evaporator to condenser section to complete the heating process of water. The working fluid used in this experiment is De-Ionized (DI) Water. Filling ratio with variations of 40%, 50%, 60%, 70%, and 80% will be used as variables to obtain the optimum design of the solar water heater system with CLPHP, using representative optimum solar irradiance in Depok, at 1.322 W/m2  as the heat input. The experimental results show that the filling ratio of 50% shows the most optimum results with the lowest thermal resistance value (0.35 °C/W), the fastest system start-up time (11.43 minutes), and the highest final water temperature gain in the condenser tank (41.65 °C)."

"Melimpahnya sumber daya alam Indonesia, khususnya sumber daya laut membuat Indonesia kaya akan potensi untuk memperkenalkan kekayaan alamnya dengan memasarkan produk kekayaan alam tersebut ke pasar Internasional. sumber daya perikanan tangkap memiliki angka yang cukup fantastis, yaitu mencapai 6.702 ton pada tahun 2018. Untuk meningkatkan ekspor, perlu diterapkan system water-treatment yang mereduksi kandungan-kandungan berbahaya yang ada pada bahan baku perlakuan produk ikan, salah satu yang terpenting yaitu perlkuan pendinginan dengan bahan baku yang sesuai dengan standar internasional dan negara mitra ekspor. Penelitian menggunakan air laut Teluk Jakarta dimana Air Laut tersebut tercemar oleh logam berat Merkuri (Hg) yang melebihi ambang batas negara mitra ekspor Republik indonesia. Untuk itu, dirancanglah 3 tingkat absorpsi Merkuri (Hg) dengan menggunakan koagulan Ferro Sulfat (FeSO4), filterisasi secara fisika oleh MMF, dan absorpsi Merkuri oleg Granular Activated Carbon sehingga produk ikan akan memenuhi standar ekspor minimum yang telah ditetapkan oleh Kementerian Kelautan dan Perikanan Republik Indonesia melalui Peraturan Pemerintah Republik Indonesia No. 57 tahun 2015 tentang Sistem Jaminan Mutu dan Keamanan Hasil Perikanan serta Peningkatan Nilai Tambah Produk Hasil Perikanan.

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The abundance of Indonesia's natural resources, especially marine resources, makes Indonesia rich in potential to introduce its natural wealth by marketing the products of these natural resources to the international market. Capture fisheries resources have quite a fantastic number, reaching 6,702 tons in 2018. To increase exports, it is necessary to implement a water-treatment system that reduces the harmful ingredients present in the raw materials for treating fish products, one of the most important is the need for cooling. with raw materials that comply with international standards and export partner countries. The study used seawater in Jakarta Bay where the sea water was polluted by the heavy metal Mercury (Hg) which exceeded the threshold of the export partner country of the Republic of Indonesia. For this reason, 3 levels of Mercury absorption (Hg) were designed using Ferro Sulfate (FeSO4) coagulant, physical filtration by MMF, and Mercury absorption by Granular Activated Carbon so that fish products will meet the minimum export standards set by the Ministry of Marine Affairs and Fisheries of the Republic of Indonesia. Indonesia through Government Regulation of the Republic of Indonesia No. 57 of 2015 concerning the Quality Assurance System and Safety of Fishery Products and Increasing the Added Value of Fishery Products."